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| Re: (Belated) Requiem for the R-44(Preservation?) (1167447) | |||
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Re: (Belated) Requiem for the R-44(Preservation?) |
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Posted by randyo on Thu Jul 19 16:58:02 2012, in response to Re: (Belated) Requiem for the R-44(Preservation?), posted by Joe V on Thu Jul 19 15:43:30 2012. Both R-44s and 46s had a brake system that utilized P wire to control the brakes electronically. The R-44s had the WABCO RT-5 which was almost identical to the M-1's RT-5 system while the R-46s had the Westcode version of the same system. I think the problem was the unfamiliarity with that type of brake system of the NYCT Car Equipment employees. From what I have heard, the LIRR M-1s encountered similar brake failures when first delivered. Additionally, the NYCTS was a slightly more hostile environment than the LIRR or M/N and it's likely that the greater concentration of steel dust in the subway portions of the NYCTS contributed to the high failure rate of the R-44 brakes. While the R-46s performance was slightly better, those cars also suffered from incidents of P wire failures which is what prompted the MTA to change the brake systems on those cars to the respective Westcode and NYAB versions of the proven RT-2 (SMEE) brakes just prior to and during GOH and to order RT-2 and the NYAB variant, Newtran brakes on the R-62 and 68 orders. |
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